Chemical Composition
| Grade Symbol |
Alloy |
Elements |
Composition % |
| F5 |
4% to 6% Chromium |
Carbon |
0.15 max |
| Manganese |
0.30 - 0.60 |
| Phosphorus |
0.030 max |
| Sulfur |
0.030 max |
| Silicon |
0.50 max |
| Nickel |
0.50 max |
| Chromium |
4.0 - 6.0 |
| Molybdenum |
0.44 - 0.65 |
Mechanical Properties
| Property | Value |
|---|
| Tensile Strength, min, ksi [MPa] |
70 [485] |
| Yield Strength, min, ksi [MPa] |
40 [275] |
| Elongation in 2 in. [50mm] or 4D, min, % |
20 |
| Reduction or Area, min, % |
35 |
| Brinell Hardness Number, HBW |
143-217 |
Heat Treatment
After hot working, forgings shall be cooled to a temperature below 1000 °F [538 °C] prior to heat treating in accordance with the requirements.
